Filter



Patented Aug. 14,A 1 945 Vunirsi) s'rirrizs Pars/Nr 'or-'rica' sesam i "mi m v Application 1s', im. semi No. use

s clams. (ci. zio-1w The present invention relates to certain features of betterment and advantage in filters and more particularly in those of the edge-nitration typ. and it concerns especially the mounting of the filter-element incorporating the layers of matirial between which the filtering action takes p ace.

In order that those skilled in. this art may readily understand the invention and the advantages accruing from its employment, a present, preferred. desirable embodiment of the invention, comprising a illter adaptedto nlter the anti-icing duid of an airplane, hasbeen illustrated in the 'accompanying drawing, Vforming a part oi. this speciilcation, and lto which reference should be had in connection with the following detailed descriptlon, and, -for simplicity. the same parts of either instance suchpaper has a suillciently'unsurface to provide the required edge-filtra-V tion property, the paper being impregnated or and closed by a metal end-member 2l having the structure, as shown in the several views, have -shoWingit connected to inlet and outlet pipes;

Figure 2 is a plan view of the structure presentedinFigure 1; i

Figure 3 is an enlarged'vlew showing a portion 25 only of the iilter in central, vertical section;

Figure 4 is a horizontal section on line 4,-4 of Figure 3 viewed looking upwardly;

Figure 5 illustrates the several parts of the illter-element in perspective and in separated relaai! tion: and

Figure 6 is a perspective view lter-element. l

By reference to this drawing, it will be seen that of the complete an internally Iserai-threaded depending wall I! and above the chamber I3 dened by such wall there i's a smaller cylindrical chamber il directly communicating therewith, the chamber I3 having a top, ilat, annular shoulder or surface il surrounding ,the entrance to compartment il.

A lateral inletapassag'e i8 adapted to be connected to an entrance-pipe i1 is in communication with the outer portion of chamber I3 by reasony of a short conduit i8.

On the other side of the iilter-head,'it has an outlet-passage il designed to be Joined to a discharge-pipe 2i, the delivery conduit il being connected to the upper portion of the smalleru chamber Mbyapassage 22. M v

The illter-element comprises a series of reEiS- tered, l face-to-face rcontacting washer-shaped the element may be composed ora spirallyon its bottom face a central, cylindrical cavity Il andon-its upper face a corresponding, cylindrical, centrally-apertured boss 26 iltting snugly in the lower end of the pack 23, a neoprene orother V appropriate ring washer or gasket 21 resting on the member u, encircling the boss II, and bear-A ing against the annular underface of the hollow unit 28.

By means of a rivet 28, occupying the hole through the boss 2l, the center part of a U- shaped metal spring, characterized as a whole It,

is fastened, to the top `of the end-member Il, as shown in Flgure3, the two upstanding arms 3|. 30 of such resilient member normally tending to diverge somewhat as illustrated inlllgure 5, the upper end portions of such upstandlng, elastic members having registering apertures 3i. Il receiving the opposite, inwardly-directed lugs or projections 32, $2 of an apertured, metal disc 2 3 at they upper end of the filter-element between two,A annular, neoprene gaskets 34 and 35, the

the upper part or head portion of the meer has 35 former N being interposed between the uppermost paper surface of the fllterelement and the disc, and the latter Il being located between the upper surface of such diss and the shoulder i5 heretofore referred to, the extreme upper ends of the arms tl, 3l ntting in the small chamber ld with their four corners engaging the wall of such chamber as presented in Figure 4.

portion Il, isscrewed into the chamber il with a Y suitable resilient gasket 42 between the ilange Il and the annular bottom surface of the wall I3 `iorllnlng therewith a pressure-tight enclosure. a

spring' Il. iltting in part in the cavity Il of the end-member 2l and bearing against the bottom wall of the casing or shell. pressing the filterelement upwardly and suitably maintaining it in wound relatively-narrow ribbon of paper, but in 56 proper operative relation.

The passage through the filter-element and the chamber it are of the same diameter and the opposite edges of the pair of arms 39, 8d engage the inner surfaces of such passage and chamber, as illustrated, thus maintaining the iilter-element in proper, central, registered position.

To prevent the casing or shell 36 from becoming Jarred loose, the main-body or head of the lter is provided with an apertured ear di, and a locking-wire @t extended through the hole thereof and through the aperture of the appropriate part 39 precludes unintentional loosening of the casing, but when the filter-element requires' cleaning yor replacement, such locking-wire t4 be nlteredl or by of its con fm and unitedly surrounding an internal :u ge through th Series, a CIOSUIEIO One end Of Such passage,

and a member in said passage and secured to said closure, the novel improvement being that said member has a pair tot apertured resilient arms with a tendency to diverge laterally of said filter-element, in combination with an apertured disc having a pair of lugs extended inwardly of said disc aperture and fitting in the apertures of vsaid arms, said discl bearing against the oppo- .site end of said series of layers.

is untwisted, leaving the shell vor casing free to be turned and this is removed from the head of main-body whereupon the iilter-element may be taken out as a unit and cleaned and replaced.

.I f a new paper-pack isrequired,'the old one is readily released by squeezing the arms til, t@

of the member 29 toward one another freeing thexnA from the lugs t2, 32, whereupon theeendmember 2c and its attached parts may be with drawn from theelement and used with a new put together as illus- 2. The novel improvement in a filter-element set forth in claim 1 in which said lter-element passage is cylindrical, in which two opposite edges of each oi said arms engage the Vwall of said passage, and in which the tendency of said arms to diverge holds ,the edges of said arms in engagement with the wall of said pe.

Y 3. In a lter of known type having a* hollow body with an inlet and outlet, a casing demountably secured to and depending from said body and forming an enclosure therewith, an edge-nitration filter-element in said enclosure and operattive between said inlet and outlet, said iilter-ele filtered iiows through the connecting passages y ous modiiicationsmay be resorted to without departure from the heart and essence of the invention as set' forth in the appended claims and without-the loss or sacrice of any of the material benefits or advantages accruing from the employment ofy the invention.

I claim:

a closure for one end of such passage, an apertured disc at opte end of-said were with its aperture in communication with said passage, and a member in said passage and secured to said closure, the novel combination of features being (a) that saidmember has a pair of resilient arms tending to serate, (b) that 'said disc has an interlocking engagement with the arms of said member. (c) that said has a chamber in register with the ge through said'iter-element, (d) that said arms extend beyond said disc into said chamber, and` (e) that i -two opposite edges of each said arms engage the wall of said nner-element passage and engage the wall of said chamber, thereby center the lter-element with respect to said chber.

4. The novel combination set forth in claim 3 in which said resilient arms are apertured and 1. In an edge-wise .ltration filter-element of known type having a series of registered 'faceto-iace contacting layers of an uneven-surface material substantially unaiected by the iiuid to 

